Enthusiast and eccentric try dance (8)
I believe the answer is:
fandango
'dance' is the definition.
(type of dance)
'enthusiast and eccentric try' is the wordplay.
'enthusiast' becomes 'fan' (fan is a kind of enthusiast).
'eccentric' indicates anagramming the letters.
'try' becomes 'go' (both can mean an attempt).
'and' anagrammed gives 'dan'.
'fan'+'dan'+'go'='FANDANGO'
(Other definitions for fandango that I've seen before include "Spanish Steps" , "Spanish 2 Down" , "Spanish dance -- a dong fan (anag)" , "Spanish courtship dance in triple time" , "Old Spanish dance in triple time" .)